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Appendix B—Installation Guidelines
Table 35. 460V Temperature and Switching Frequency Deratings (VT)
Variable Torque
(VT) /Low
Overload (IL)
Temperature
Frame
Size
40°C
50°C
60°C
Percentage of Rated Current
Switching Frequency
1 kHz
2 kHz
3 kHz
3.6 kHz
4 kHz
5 kHz
6 kHz
7 kHz
8 kHz
9 kHz
10 kHz
12 kHz
FR1
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
93.8%
87.5%
81.3%
75.0%
62.5%
FR2
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
95.2%
90.3%
85.5%
80.6%
71.0%
FR3
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
100.0%
95.5%
91.0%
86.5%
82.0%
73.0%
FR4
100.0%
100.0%
100.0%
100.0%
95.7%
91.4%
87.1%
81.8%
76.4%
71.1%
65.7%
—
FR5
100.0%
100.0%
100.0%
100.0%
94.8%
89.6%
84.4%
77.8%
71.2%
64.6%
58.0%
—
FR6
1
1
1
1
1
1
1
1
1
1
1
—
FR1
75.0%
75.0%
75.0%
75.0%
75.0%
75.0%
75.0%
70.8%
66.7%
62.5%
58.3%
50.0%
FR2
80.6%
80.6%
80.6%
80.6%
80.6%
80.6%
80.6%
77.4%
74.2%
71.0%
67.7%
61.3%
FR3
84.9%
84.9%
84.9%
84.9%
84.9%
84.9%
84.9%
81.1%
77.2%
73.4%
69.5%
61.8%
FR4
87.6%
87.6%
87.6%
87.6%
83.7%
79.8%
75.8%
70.9%
66.0%
61.1%
56.2%
—
FR5
82.9%
82.9%
82.9%
82.9%
78.0%
73.2%
68.3%
62.2%
56.1%
50.0%
43.9%
—
FR6
1
1
1
1
1
1
1
1
1
1
1
—
FR1
58.3%
58.3%
58.3%
58.3%
58.3%
58.3%
58.3%
54.2%
50.0%
45.8%
41.7%
33.3%
FR2
67.7%
67.7%
67.7%
67.7%
67.7%
67.7%
67.7%
64.5%
61.3%
58.1%
54.8%
48.4%
FR3
71.3%
71.3%
71.3%
71.3%
71.3%
71.3%
71.3%
67.5%
63.8%
60.0%
56.2%
48.7%
FR4
72.4%
72.4%
72.4%
72.4%
68.8%
65.2%
61.7%
57.2%
52.7%
48.3%
43.8%
—
FR5
68.3%
68.3%
68.3%
68.3%
64.0%
59.8%
55.5%
50.2%
44.8%
39.5%
34.1%
—
FR6
1
1
1
1
1
1
1
1
1
1
1
—
Note
1 FR6 available in 2015.
52
DG1 Series VFD
MN040002EN—March 2014
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